Killing the two party duopoly requires significant constitutional changes to how elections are held. One way to do that would be ranked choice voting as impleme

Killing the two party duopoly requires significant constitutional changes to how elections are held. One way to do that would be ranked choice voting as implemented in e.g. Maine (https://en.wikipedia.org/wiki/Ranked-choice_voting_in_the_United_States#Maine,_2020 https://en.wikipedia.org/wiki/Ranked-choice_voting_in_the_Un...). However, the key point is that such a system would mainly benefit a potential third party, but any changes to the system need to be agreed upon by the current representatives whose interests and reelection would be hurt by such a change.